Is a gem ready for Rails 4 or 5?

Rails 4: 553 ready, 38 not ready, and 437 unknown
Rails 5: 49 ready, 7 not ready, and 972 unknown
Name Status Rails 4 Notes Rails 4 Status Rails 5 Notes Rails 5 Status or notes updated
omniauth ready

-

ready

since version v1.3.1 (https://git.io/vXCd0)

about 1 month ago
geocoder ready

says so in readme

ready

see https://git.io/vXCdc

about 1 month ago
novus-nvd3-rails unknown unknown 2 months ago
dotenv-rails ready

Works fine, tested with Rails 4.

ready

since version 2.1.0 (https://github.com/bkeepers/dotenv/blob/master/Changelog.md#210---jan-13-2016)

3 months ago
simple_form ready

working from gem version 3.0.0

ready

since version 3.2.1

3 months ago
wicked ready

travis build

ready

for sure from version 1.3.0

3 months ago
money-rails ready

Tested in rails upto 4.2.6

ready

from version 1.7.0

3 months ago
exception_notification ready

since 4.0.0.rc1

ready

from version 4.2.0

3 months ago
minitest-rails ready

yes

ready

from 3.0.0 https://github.com/blowmage/minitest-rails/blob/master/CHANGELOG.rdoc#300--2016-07-01

3 months ago
rails-dom-testing ready

yes

ready

from 2.0.0 https://github.com/rails/rails-dom-testing/releases

3 months ago
active_record_union ready

why not?

ready

According to changelog ready from 1.2.0 https://github.com/brianhempel/active_record_union#changelog

3 months ago
pg ready

Does not depend on Rails

ready

Does not depend on Rails

3 months ago
hyperkit ready

It works!

unknown 4 months ago
drafting ready

see readme

ready

see readme

4 months ago
keepr ready

see readme

ready

see readme

4 months ago
acts_as_paranoid ready

See comment of jonty davis below

ready

0.5.0

4 months ago
squeel ready

Support for ActiveRecord 4.0.0 added in version 1.1.0 (source)

not ready

see https://github.com/activerecord-hackery/squeel/issues/412

4 months ago
newrelic_rpm ready

_

ready

since version 3.15.0

4 months ago
database_cleaner ready

since gem version 1.0.0 (source)

ready

since version 1.5.2

4 months ago
gon ready

_

ready

since version 6.0.1

4 months ago